Using dolphin...

thats my problem... thats is only a example

/-----------------\              /-------------------------------------\
|File  2MB  1 File|  -------->   | HDD    4MB Free   0 Files, 0 Folders|
\-----------------/              \-------------------------------------/

                     /-------\
                     |CANCEL!|
                     \-------/

        /------------------------------------\
        | HDD   2MB Free   0 Files, 0 Folders|
        \------------------------------------/


Why this happen?? Where is 2 Mb??

Thanks for the help if u can give me